Linburg–Comstock anomaly

Linburg-Comstock anomaly (or syndrome when symptomatic) refers to an anatomical variant of the flexor tendons of the hand. It is a situation where the flexor pollicis longus (FPL) muscle sends a connecting tendon to flexor digitorum profundus (FDP) muscle, causing simultaneous flexion at the distal interphalangeal joint of the index finger when the interphalangeal joint of the thumb is flexed.